You must restart the Message Queuing service to clean up message files

RESOLUTION

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

The following fix installs a periodic cleanup of empty Message Queuing message files. The default interval for cleanup is six hours. This interval can be modified by a new registry key. To change the default interval, you must add MessageCleanupInterval to the registry.

1. Start Registry Editor (REGEDT32.EXE).
2. Locate and select the following registry subkey:

   HKEY_LOCAL_MACHINE\ Software\Microsoft\MSMQ\Parameters
   					

3. From the Edit menu, click ADD VALUE.
4. In the Value Name Field, type MessageCleanupInterval.
5. In the Data Type Field, select REG_DWORD.
6. For the data value, enter the desired interval in milliseconds (for example, 3600000 (decimal) for one hour).
7. Exit Registry Editor to save the changes.

The next time you restart the Message Queuing service, the new interval will be used to cleanup empty message files.